CN113273050A

CN113273050A - Battery charging method, device, equipment and readable storage medium

Info

Publication number: CN113273050A
Application number: CN201980088225.8A
Authority: CN
Inventors: 杨鑫
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-03-25
Filing date: 2019-03-25
Publication date: 2021-08-17
Also published as: WO2020191583A1; EP3930140A1; EP3930140A4; US20210376644A1

Abstract

The application discloses a battery charging method, a device, equipment and a readable storage medium. The battery charging method comprises the following steps: acquiring the current actual capacity of the battery; and determining the charging current of the battery in a constant current charging stage according to the current actual capacity of the battery. The method can obtain the current actual capacity of the battery by continuously measuring the capacity of the battery, and continuously adjust the charging current of the battery in the constant current charging stage according to the actual capacity, so that the aging and attenuation speed of the battery is slowed down to the greatest extent, and the service life of the battery is prolonged.

Description

Battery charging method, device, equipment and readable storage medium

Technical Field

The present disclosure relates to a battery charging technology, and in particular, to a battery charging method, apparatus, device, and readable storage medium.

Background

With the continuous development of the rapid charging technology, the charging speed of the battery is faster and faster. However, as the charging speed of the battery increases, the impact on the life of the battery also increases, and the aging speed of the battery also increases.

Currently, research on battery life optimization mainly focuses on optimization of a battery system, such as techniques of improving structural stability of positive and negative electrode materials, namely coating or doping. However, the inventor finds in the research process that the improvement of the battery life can be improved from the practical use condition of the battery, such as the charging angle, besides the improvement of the battery system.

The above information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

In view of the above, the present disclosure provides a battery charging method, apparatus, device and readable storage medium.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows, or in part will be obvious from the description, or may be learned by practice of the disclosure.

According to an aspect of the present disclosure, there is provided a battery charging method including: acquiring the current actual capacity of the battery; and determining the charging current of the battery in a constant current charging stage according to the current actual capacity of the battery.

According to an embodiment of the present disclosure, the method further comprises: and controlling the constant current charging stage to charge the battery by the determined charging current.

According to an embodiment of the present disclosure, determining a charging current of the battery in a constant current charging phase according to a current actual capacity of the battery includes: and when the current actual capacity of the battery is smaller than the stored actual capacity measured after the previous charging of the battery is finished or before the previous charging, calculating the charging current according to the current actual capacity of the battery and based on the same multiplying power used in the constant current charging stage in the previous charging process.

According to an embodiment of the present disclosure, determining a charging current of the battery in a constant current charging phase according to a current actual capacity of the battery further includes: and when the current actual capacity of the battery is larger than or equal to the stored actual capacity measured after the previous charging of the battery is finished or before the previous charging, determining the charging current as the charging current of the battery in the constant current charging stage in the previous charging process.

According to an embodiment of the present disclosure, determining a charging current of the battery in a constant current charging phase according to a current actual capacity of the battery includes: inputting the current actual capacity of the battery into a charging current determination model so as to output the charging current according to the charging current determination model; wherein the charging current determination model is a model established based on big data learning.

According to an embodiment of the present disclosure, the method further comprises: and determining the cut-off current of the battery in the constant-voltage charging stage according to the current actual capacity of the battery.

According to an embodiment of the present disclosure, determining the cutoff current of the battery in the constant voltage charging phase according to the current actual capacity of the battery includes: inputting a present actual capacity of the battery into a cutoff current determination model to output the cutoff current according to the cutoff current determination model; wherein the off-current determination model is a model established from big data learning.

According to an embodiment of the present disclosure, the method further comprises: and controlling to stop the constant voltage charging process when the charging current of the battery is reduced to the cut-off current in the constant voltage charging stage.

According to an embodiment of the present disclosure, determining a charging current of the battery in a constant current charging phase according to a current actual capacity of the battery includes: and respectively determining the charging current of the battery in different constant current charging stages according to the current actual capacity of the battery.

According to an embodiment of the present disclosure, the cutoff current of the battery in the constant voltage charging phase is determined according to the current actual capacity of the battery: and respectively determining the cut-off current of the battery in different constant voltage charging stages according to the current actual capacity of the battery.

According to another aspect of the present disclosure, there is provided a battery charging apparatus including: the battery capacity acquisition module is used for acquiring the current actual capacity of the battery; and the charging current determining module is used for determining the charging current of the battery in a constant current charging stage according to the current actual capacity of the battery.

According to still another aspect of the present disclosure, there is provided an apparatus to be charged, including: a battery and control module; the control module is used for acquiring the current actual capacity of the battery and determining the charging current of the battery in a constant current charging stage according to the current actual capacity of the battery.

According to an embodiment of the present disclosure, the control module is further configured to control to charge the battery with the determined charging current in the constant current charging phase.

According to an embodiment of the present disclosure, the control module is further configured to provide the determined charging current to a wireless charging device or a power supply device.

According to an embodiment of the present disclosure, the control module is configured to calculate the charging current based on a same rate as a rate used in a constant current charging stage in a previous charging process according to a current actual capacity of the battery when the current actual capacity of the battery is smaller than a stored actual capacity measured after the previous charging of the battery is completed or before the previous charging.

According to an embodiment of the present disclosure, the control module is further configured to determine the charging current as a charging current of the battery in a constant current charging phase in a previous charging process when a current actual capacity of the battery is greater than or equal to a stored actual capacity measured after the previous charging of the battery is completed or before the previous charging.

According to an embodiment of the present disclosure, the control module is configured to input a current actual capacity of the battery into a charging current determination model, so as to output the charging current according to the charging current determination model; wherein the charging current determination model is a model established based on big data learning.

According to an embodiment of the present disclosure, the control module is further configured to determine a cutoff current of the battery in a constant voltage charging phase according to a current actual capacity of the battery.

According to one embodiment of the disclosure, the control module is configured to input a current actual capacity of the battery into a cutoff current determination model to output the cutoff current according to the cutoff current determination model; wherein the off-current determination model is a model established from big data learning.

According to an embodiment of the present disclosure, the control module is further configured to control to stop the constant voltage charging process when the charging current of the battery decreases to the cutoff current in the constant voltage charging phase.

According to an embodiment of the present disclosure, the control module is further configured to provide the determined off-current to the wireless charging device or the power supply device.

According to an embodiment of the present disclosure, the control module is configured to determine charging currents of the battery in different constant current charging stages according to a current actual capacity of the battery.

According to an embodiment of the present disclosure, the control module is configured to determine cutoff currents of the battery in different constant voltage charging phases according to a current actual capacity of the battery.

According to still another aspect of the present disclosure, there is provided a wireless charging apparatus including: the control module is used for acquiring the current actual capacity of the battery and determining the charging current of the battery in the constant current charging stage according to the current actual capacity of the battery.

According to still another aspect of the present disclosure, there is provided a power supply apparatus including: the control module is used for acquiring the current actual capacity of the battery and determining the charging current of the battery in the constant current charging stage according to the current actual capacity of the battery.

According to yet another aspect of the present disclosure, there is provided a computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor, implement any of the above-described battery charging methods.

According to the battery charging method provided by the embodiment of the disclosure, the current actual capacity of the battery can be obtained by continuously measuring the capacity of the battery, and the charging current in the constant current charging stage of the battery is continuously adjusted according to the actual capacity, so that the aging and attenuation speed of the battery is slowed to the greatest extent, and the service life of the battery is prolonged.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a system block diagram illustrating a wireless charging system according to an exemplary embodiment.

Fig. 2 is a schematic diagram illustrating another wireless charging system according to an example embodiment.

Fig. 3 is a system block diagram illustrating a wired charging system according to an exemplary embodiment.

Fig. 4 is a system block diagram illustrating another wired charging system in accordance with an exemplary embodiment.

Fig. 5 is a system configuration diagram illustrating yet another wired charging system according to an exemplary embodiment.

FIG. 6 is a flow chart illustrating a method of charging a battery according to an exemplary embodiment.

FIG. 7 is a flow chart illustrating another method of charging a battery according to an exemplary embodiment.

Fig. 8 is a block diagram illustrating a battery charging apparatus according to an exemplary embodiment.

FIG. 9 is a schematic diagram illustrating a computer-readable storage medium in accordance with an example embodiment.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known structures, methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

In the present disclosure, unless expressly stated or limited otherwise, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; can be electrically connected or can be communicated with each other; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and that there may be three cases of a alone, B alone, and a and B simultaneously. The symbol "/" generally indicates that the former and latter associated objects are in an "or" relationship. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The current mainstream Constant Current and Constant Voltage (CCCV) charging mode is described first:

the charging process of the battery may include: a trickle charge phase (or mode), a constant current charge phase (or mode), a constant voltage charge phase (or mode), and a supplemental charge phase (or mode).

In the trickle charge phase, the fully discharged battery is pre-charged (i.e., recovery charging), the trickle charge current is usually one tenth of the constant current charge current, and when the battery voltage rises above the trickle charge voltage threshold, the charging current is increased to enter the constant current charge phase.

In the constant current charging stage, the battery is charged by constant current, the charging voltage rises rapidly, and when the charging voltage reaches the expected charging voltage threshold value of the battery, the constant voltage charging stage is switched. The constant current is typically a nominal charge rate current, such as a high rate 3C current, where C is the battery capacity. Assuming a battery capacity of 1700mAh, the constant current is 3 × 1700mA — 5.1A.

In the constant voltage charging stage, the battery is charged at a constant voltage, the charging current is gradually reduced, and when the charging current is reduced to a set current threshold, the battery is fully charged. In the CCCV charging mode, the current threshold is typically set to 0.01C, where C is the battery capacity. Still assuming a battery capacity of 1700mAh, the current threshold is 0.01 x 1700mA to 17 mA.

After the battery is fully charged, partial current loss occurs due to the influence of self-discharge of the battery, and the charging stage is shifted to. During the boost charging phase, the charging current is small only to ensure that the battery is at full charge.

It should be noted that the constant current charging phase does not require the charging current to be kept completely constant, and may refer to, for example, that the peak value or the average value of the charging current is kept constant for a period of time. In practice, the constant current charging stage may be a Multi-stage constant current charging (Multi-stage constant current charging) manner.

The segmented constant current charging may have M constant current stages (M is an integer not less than 2), the segmented constant current charging starts the first-stage charging with a predetermined charging current, the M constant current stages of the segmented constant current charging are sequentially executed from the first stage to the mth stage, and the current magnitude may be reduced after the previous constant current stage in the constant current stages is shifted to the next constant current stage; when the battery voltage reaches the charging termination voltage threshold, the previous constant current stage in the constant current stages will shift to the next constant current stage. The current conversion process between two adjacent constant current stages can be gradual change or step jump change.

The following describes a wireless charging system and a wired charging system in the related art, respectively.

In the wireless charging process, a power supply device (e.g., an adapter) is generally connected to a wireless charging device (e.g., a wireless charging base), and the output power of the power supply device is wirelessly transmitted (e.g., electromagnetic signals or electromagnetic waves) to the device to be charged by the wireless charging device, so as to wirelessly charge the device to be charged.

According to different wireless charging principles, wireless charging methods are mainly classified into three methods, namely magnetic coupling (or electromagnetic induction), magnetic resonance and radio wave. Currently, the mainstream Wireless charging standards include QI standard, Power Material Alliance (PMA) standard, and Wireless Power Alliance (A4 WP). The QI standard and the PMA standard both adopt a magnetic coupling mode for wireless charging. The A4WP standard uses magnetic resonance for wireless charging.

Referring to fig. 1, a wireless charging system 1 includes: a power supply device 11, a wireless charging device 12 and a device to be charged 13. The Power supply device 11 may be, for example, a Power adapter, a mobile Power supply (Power Bank), or the like; the wireless charging device 12 may be, for example, a wireless charging dock; the device to be charged 13 may be, for example, a terminal device.

After the power supply device 11 is connected to the wireless charging device 12, the output current is transmitted to the wireless charging device 12.

The wireless charging device 12 includes: a wireless transmitting circuit 121 and a first control module 122.

The wireless transmitting circuit 121 is configured to convert the electric energy output by the power supply device 11 into an electromagnetic signal (or an electromagnetic wave) for transmission, so as to wirelessly charge the device to be charged 13. For example, the wireless transmission circuit 121 may include: a wireless transmission drive circuit and a transmission coil (or transmission antenna). The wireless transmission driving circuit is used for converting the direct current output by the power supply device 11 into high-frequency alternating current, and converting the high-frequency alternating current into an electromagnetic signal (or electromagnetic wave) through a transmitting coil or a transmitting antenna to be transmitted.

The first Control module 122 can be implemented by a Micro Control Unit (MCU), for example. The first control module 122 may be configured to wirelessly communicate with the device to be charged 13 during the process of wirelessly charging the device to be charged 13 by the wireless charging apparatus 12. Specifically, the first control module 122 may wirelessly communicate with the second control module 135 in the device to be charged 13.

Further, the wireless charging device 12 may further include: a charging interface 123. The wireless transmitting circuit 121 is also configured to receive the electric energy output by the power supply device 11 through the charging interface 123, and generate an electromagnetic signal (or electromagnetic wave) according to the electric energy output by the power supply device 11.

The charging interface 123 may be, for example, a USB 2.0 interface, a Micro USB interface, or a USB TYPE-C interface. In some embodiments, the charging interface 123 may also be a lightning interface, or any other type of parallel or serial interface capable of being used for charging.

The wireless charging device 12 can communicate with the power supply device 11, for example, via the charging interface 123, without providing an additional communication interface or other wireless communication module, which can simplify the implementation of the wireless charging device 12. If the charging interface 123 is a USB interface, the wireless charging device 12 (or the wireless transmitting circuit 121) and the power supply device 13 can communicate based on a data line (e.g., a D + line and/or a D-line) in the USB interface. As another example, the charging interface 123 is a USB interface (e.g., a USB TYPE-C interface) supporting a Power Delivery (PD) communication protocol, and the wireless charging device 12 (or the wireless transmitting circuit 121) and the Power supply device 11 can communicate based on the PD communication protocol.

Further, the wireless charging device 12 may be communicatively connected to the power supply device 11 by another communication method other than the charging interface 123. For example, the wireless charging device 12 may wirelessly communicate with the power supply device 11, such as Near Field Communication (NFC).

The device to be charged 13 may be, for example, a terminal or a communication terminal including, but not limited to, a device arranged to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network and/or via, for example, a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a digital video broadcasting-handheld (DVB-H) network, a satellite network, an amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and/or a wireless interface of another communication terminal. Communication terminals arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals", and/or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communication System (PCS) terminals that may combine a cellular radiotelephone with data processing, facsimile and data communication capabilities; personal Digital Assistants (PDAs) that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. In addition, the terminal may further include, but is not limited to, a rechargeable electronic device having a charging function, such as an electronic book reader, a smart wearable device, a mobile power source (e.g., a charger, a travel charger), an electronic cigarette, a wireless mouse, a wireless keyboard, a wireless headset, a bluetooth speaker, and the like.

The device to be charged 13 includes: the wireless receiving circuit 131, the battery 133, the first charging channel 134, the second control module 135 and the detecting circuit 136.

The wireless receiving circuit 131 is configured to receive an electromagnetic signal (or an electromagnetic wave) transmitted by the wireless transmitting circuit 121, and convert the electromagnetic signal (or the electromagnetic wave) into a direct current output by the wireless receiving circuit 131. For example, the wireless receiving circuit 131 may include: a receiving coil or a receiving antenna, and a shaping circuit such as a rectifying circuit and/or a filter circuit connected to the receiving coil or the receiving antenna. The wireless receiving circuit 131 converts the electromagnetic signal (or electromagnetic wave) transmitted by the wireless transmitting circuit 121 into an alternating current through a receiving coil or a receiving antenna, and rectifies and/or filters the alternating current through a shaping circuit, thereby converting the alternating current into a stable direct current to charge the battery 133.

It should be noted that the embodiment of the present disclosure does not specifically limit the specific form of the shaping circuit and the form of the output voltage and the output current of the wireless receiving circuit 131 obtained after shaping by the shaping circuit.

Furthermore, in some embodiments, the device to be charged 13 may further include: the first voltage conversion circuit 132. The first voltage conversion circuit 132 is disposed on the first charging channel 134 (e.g., a conducting wire) and disposed between the wireless receiving circuit 131 and the battery 133. When the output voltage of the wireless receiving circuit 131 cannot satisfy the requirement of the charging voltage expected by the battery 133 and/or the output current of the wireless receiving circuit 131 cannot satisfy the requirement of the charging current expected by the battery 133, the output voltage and/or the output current may be converted by the first voltage converting circuit 132 to obtain the charging voltage and/or the charging current expected by the battery 133. For example, the output voltage and the output current of the wireless receiving circuit 131 are input into the first voltage conversion circuit 132 through the first charging channel 134; after the first voltage conversion circuit 132 converts the input voltage, the output voltage and current are applied to two ends of the battery 133 through the first charging channel 134, so as to meet the requirement of the battery 133 for the expected charging voltage and/or charging current.

Battery 133 may include a single cell or multiple cells. When the battery 133 includes multiple cells, the multiple cells may be connected in series. Therefore, the charging voltage that can be borne by the battery 133 is the sum of the charging voltages that can be borne by the plurality of battery cells, so that the charging speed can be increased, and the charging heat emission can be reduced.

For example, taking the device to be charged 13 as a mobile phone as an example, when the battery 133 of the device to be charged 13 includes a single cell, the voltage of the internal single cell is generally between 3.0V and 4.35V. And when the battery 133 of the device to be charged 13 includes two cells connected in series, the total voltage of the two cells connected in series is 6.0V to 8.7V. Therefore, compared with a single battery cell, when a plurality of battery cells are connected in series, the output voltage of the wireless receiving circuit 131 can be increased. Compared with a single battery cell, the charging speed is equivalent, and the charging current required by multiple battery cells is about 1/N (N is the number of the battery cells connected in series in the device to be charged 13) of the charging current required by the single battery cell. In other words, on the premise of ensuring the same charging speed (the same charging power), the scheme of multiple cell segments can reduce the magnitude of the charging current, thereby reducing the heat productivity of the device to be charged 13 in the charging process. On the other hand, compared with the single-cell scheme, the charging voltage can be increased by adopting the multi-cell series scheme under the condition that the charging current is kept the same, so that the charging speed is increased.

The second control module 135 may be implemented by, for example, a separate MCU, or may also be implemented by an Application Processor (AP) inside the device to be charged 13. The second control module 135 is configured to communicate with the first control module 122 in the wireless charging device 12, and feed back information such as the detected voltage value and/or current value on the first charging channel 134, the remaining capacity of the battery 133, or the preset full charge time to the wireless charging device 12, and also feed back error information and transmission termination information to the first control module 122; in addition, the feedback information may further include an adjustment instruction of the voltage and/or the current determined by the device to be charged 13 according to the detected voltage value and/or the current value on the first charging channel 134, the remaining charge amount, or the preset full charge time.

The detection circuit 136 is used to detect the voltage value and/or the current value on the first charging channel 134. In some embodiments, when the first voltage conversion circuit 132 is disposed in the device to be charged 13, the voltage value and/or the current value on the first charging channel 134 may refer to a voltage value and/or a current value between the first voltage conversion circuit 132 and the battery 133, that is, an output voltage and/or an output current of the first voltage conversion circuit 132, which is directly applied to the battery 133 to charge the battery 133; alternatively, the voltage value and/or the current value on the first charging channel 134 may also refer to a voltage value and/or a current value between the wireless receiving circuit 131 and the first voltage converting circuit 132, that is, an output voltage value and/or a current value of the wireless receiving circuit 131.

In some embodiments, the detection circuit 136 may include: a voltage detection circuit and a current detection circuit.

The voltage detection circuit is configured to sample a voltage on the first charging channel 134 and transmit a sampled voltage value to the second control module 135. The voltage detection circuit may sample the voltage on the first charging channel 134 by serial division, for example.

The current detection circuit is configured to sample a current on the first charging channel 134 and transmit the sampled current value to the second control module 135. The current sensing circuit may sample the current on the first charging channel 134, for example, by a current sensing resistor and a current sensing meter.

After receiving the information fed back by the device to be charged 13 through the second control module 135, the first control module 122 may adjust the transmission power of the wireless transmission circuit 121 according to the voltage value and/or the current value on the first charging channel 134, or according to the adjustment instruction of the voltage and/or the current, so that the voltage and/or the current of the direct current output by the first charging channel 134 matches the charging voltage and/or the current required by the battery 133.

It should be understood that "matching the required charging voltage and/or current of the battery 133" includes: the voltage and/or current of the dc power output by the first charging channel 134 is equal to or within a predetermined range (e.g., 100 mv to 200 mv above and below) the expected charging voltage and/or current of the battery 133.

Alternatively, after receiving the information fed back by the device to be charged 13 through the second control module 135, the first control module 122 may adjust the transmission power of the wireless transmission circuit 121 according to the voltage value and/or the current value on the first charging channel 134, or according to the adjustment instruction of the voltage and/or the current, so that the voltage and/or the current of the direct current output by the first charging channel 134 meet the charging requirement of the battery 133 in at least one of the trickle charging phase, the constant current charging phase, and the constant voltage charging phase.

Further, as described above, the second control module 135 may also send battery status information to the first control module 122. Wherein the battery state information includes: the current charge and/or the current voltage of the battery 133 in the device to be charged 13. After receiving the battery state information, the first control module 122 may first determine the current charging stage of the battery 133 according to the battery state information, and further determine a target output voltage value and/or a target charging current that matches the current charging stage of the battery 133; then, the first control module 122 may compare the output voltage and/or the output current of the first charging channel 134 sent by the second control module 135 with the determined target output voltage value and/or the determined target charging current of the charging stage in which the battery 133 is currently located to determine whether the output voltage and/or the output current of the first charging channel 134 matches the determined charging stage in which the battery 133 is currently located. If not, the transmitting power of the wireless transmitting circuit 121 is adjusted until the output voltage and/or the output current of the fed-back first charging channel 134 matches the charging stage in which the battery 133 is currently located.

In addition, as described above, the second control module 135 may directly feed back the detected output voltage and/or output current of the first charging channel 134 to the first control module 121, or may feed back an adjustment command determined according to the detected output voltage and/or output current of the first charging channel 134. The adjustment instruction may be, for example, an instruction to increase or decrease the transmission power of the wireless transmission circuit 121. Alternatively, the wireless charging device 12 may also set multiple gear positions of the transmission power for the wireless transmission circuit 121, and the first control module 121 adjusts the transmission power of the wireless transmission circuit 121 by one gear position every time it receives the adjustment instruction, until the fed back output voltage and/or output current of the first charging channel 134 matches the charging stage currently located by the battery 133.

The present disclosure does not limit the communication manner and the communication sequence between the wireless charging device 12 and the device to be charged 13 (or the first control module 122 and the second control module 135).

In some embodiments, the wireless communication between the wireless charging apparatus 12 and the device to be charged 13 (or the first control module 122 and the second control module 135) may be unidirectional wireless communication. Taking the to-be-charged device 13 as an initiator of communication and the wireless charging apparatus 12 as a receiver of communication in the wireless charging process of the battery 133 as an example, for example, in a constant current charging phase of the battery, the to-be-charged device 13 may detect a charging current of the battery 133 (i.e. an output current of the first charging channel 134) through the detection circuit 136, and when the charging current of the battery 133 does not match with the current charging phase, the to-be-charged device 13 sends feedback information or adjustment information to the wireless charging apparatus 12 to instruct the wireless charging apparatus 12 to adjust the transmission power of the wireless transmission circuit 121.

In some embodiments, the wireless communication between the wireless charging apparatus 12 and the device to be charged 13 (or the first control module 122 and the second control module 135) may be bidirectional wireless communication. Two-way wireless communication generally requires the receiver to send a response message to the initiator after receiving a communication request initiated by the initiator, and the two-way communication base value can make the communication process safer. In the bidirectional wireless communication process, any one of the wireless charging apparatus 12 and the device to be charged 13 may initiate a bidirectional communication session as a master device side, and accordingly the other side may make a first response or a first reply to the communication initiated by the master device side as a slave device side, and further the master device side makes a second response for pertinence after receiving the first response or the first reply, thereby completing a communication negotiation process between the master device and the slave device.

The second response which is the main device side and makes pertinence after receiving the first response or the first reply comprises the following steps: the master device side does not receive the first response or the first reply aiming at the communication session from the slave device side within the preset time, and the master device side also makes a second response aiming at the first response or the first reply of the slave device.

In addition, after the slave device side makes a first response or a first reply to the communication session initiated by the master device side, a communication negotiation process between the task master and the slave device sides can be completed without making a second response aiming at the first response or the first reply of the slave device side by the master device side.

During the communication between the wireless charging apparatus 12 and the device to be charged 13, the second control module 135 in the device to be charged 13 may couple the feedback information to the receiving coil of the wireless receiving circuit 131 and send the feedback information to the first control module 122 of the wireless charging apparatus 12.

Alternatively, the device to be charged 13 may also communicate with the wireless charging device 12 through at least one of bluetooth, WiFi, mobile cellular network communication (such as 2G, 3G, 4G, or 5G), wireless communication (such as ieee 802.11, 802.15(WPANs), 802.16(WiMAX), 802.20, etc.), short-range wireless communication based on a high-frequency antenna (such as 60GHz), optical communication (such as infrared communication), ultrasonic communication, ultra wideband (UMB) communication, etc., so as to transmit the above-mentioned feedback information to the wireless charging device 12. It can be understood that, when the communication is performed by the above-mentioned communication method, the device to be charged 13 and the wireless charging device 12 further include corresponding communication modules, such as a bluetooth communication module, a WiFi communication module, a 2G/3G/4G/5G mobile communication module, a high-frequency antenna, and an optical communication module. At least one of an ultrasonic communication module, an ultra-wideband communication module, and the like. It should be understood that the standards that may be employed for wireless communication as described above include past and existing standards, as well as future versions and standards that employ such standards without departing from the scope of this disclosure. By performing communication by the above-described wireless communication method, the reliability of communication can be improved, thereby improving charging safety. Compared with the related art (for example, the Qi standard), in which the feedback information is coupled to the receiving coil of the wireless receiving circuit 131 for communication by means of signal modulation, the reliability of communication can be improved, and voltage ripples caused by signal coupling communication can be prevented from affecting the voltage processing process of the first voltage conversion circuit 132 of the device to be charged 13. In addition, for the voltage ripple when the wireless receiving coil outputs, if the ripple is not effectively processed, the wireless charging safety problem may be caused, and certain potential safety hazard exists. By the above wireless communication method, the voltage ripple can be eliminated, so that a circuit for processing the voltage ripple can be omitted, the complexity of the charging circuit of the device to be charged 13 is reduced, the charging efficiency is improved, the circuit setting space is saved, and the cost is reduced.

The power supply device 11 may be a power supply device with a fixed output power, or may be a power supply device with an adjustable output power. A voltage feedback loop and a current feedback loop can be arranged in the power supply device with adjustable output power, so that the output voltage and/or the output current of the power supply device can be adjusted according to actual requirements.

As described above, the wireless charging device 12 may continuously adjust the transmission power of the wireless transmission circuit 121 during the charging process, so that the output voltage and/or the output current of the first charging channel 134 matches the charging stage in which the battery 133 is currently located.

In some embodiments, the first control module 122 may adjust the amount of power that the wireless transmission circuit 121 draws from the maximum output power provided by the power supply device 11, thereby adjusting the transmission power of the wireless transmission circuit 121. That is to say, the control right of the transmission power adjustment of the wireless transmission circuit 121 is allocated to the first control module 122, and the first control module 122 can adjust the transmission power of the wireless transmission circuit 121 by adjusting the amount of power extracted from the maximum output power after receiving the feedback information of the device to be charged 13, which has the advantages of high adjustment speed and high efficiency.

For example, a power adjustment circuit may be provided inside the first control module 122, inside the wireless transmission circuit 121, or between the first control module 122 and the wireless transmission circuit 121. The power adjustment circuit may include, for example, a Pulse Width Modulation (PWM) controller and a switching unit. The first control module 122 may adjust the transmission power of the wireless transmission circuit 121 by adjusting a duty ratio of a control signal sent by the PWM controller and/or by controlling a switching frequency of the switching unit.

Alternatively, in other embodiments, the first control module 122 may adjust the output voltage and/or the output current of the power supply device 11 by communicating with the power supply device 11, so as to adjust the transmission power of the wireless transmission circuit 121. That is, the control right of the transmission power adjustment of the wireless transmission circuit 121 is assigned to the power supply device 11, and the transmission power of the wireless transmission circuit 121 is adjusted by changing the output voltage and/or the output current by the power supply device 11. The advantage of this adjustment is how much power is needed by the wireless charging device 12 and how much power is provided by the power supply device 11, and there is no waste of power.

It should be understood that, similar to the manner of communication between the wireless charging device 12 and the device to be charged 13, the communication between the wireless charging device 12 (or the first control module 122) and the power supply device 11 may be one-way communication or two-way communication, and the disclosure is not limited thereto.

Referring to fig. 2, the difference from the wireless charging system 1 shown in fig. 1 is that the wireless charging device 22 in the wireless charging system 2 further includes: the second voltage conversion circuit 224. The second voltage conversion circuit 224 is disposed between the charging interface 123 and the wireless transmission circuit 121, and is configured to receive the output voltage and the output current of the power supply apparatus 11, and the wireless transmission circuit 121 is configured to generate an electromagnetic signal (or an electromagnetic wave) based on the voltage and the current converted by the second voltage conversion circuit 224.

The adjusting of the transmission power of the wireless transmission circuit 121 by the first control module 122 may include: the first control module 122 adjusts the voltage and/or current converted by the second voltage conversion circuit 224 to adjust the transmission power of the wireless transmission circuit 121.

When the power supply device 11 is a power supply device with constant output power, the first control module may adjust the output voltage and/or the output current of the second voltage converting circuit 224, so as to adjust the transmission power of the wireless transmitting circuit 121, which may improve the versatility of the wireless charging device 22, so as to be suitable for the existing common power supply device 11. The second voltage conversion circuit 224 may include, for example, a PWM controller and a switching unit, and the first control module may adjust the output voltage and/or the output current of the second voltage conversion circuit 224 by adjusting a duty ratio of a control signal sent by the PWM controller and/or by controlling a switching frequency of the switching unit, so as to adjust the transmission power of the wireless transmission circuit 121.

Alternatively, in some embodiments, the second voltage conversion circuit 224 may receive the output voltage and the output current of the power supply apparatus 11 through the charging interface 123. For example, when the power supply apparatus 11 is a common power supply apparatus, the wireless charging apparatus 22 is connected to the common power supply apparatus through the charging interface 123, and during wireless charging, the first control module 122 may control the second voltage converting circuit 224 to start operating, and adjust the output voltage and/or the output current of the second voltage converting circuit 224 according to the feedback information of the device to be charged 13, so that the transmitting power of the wireless transmitting circuit 121 meets the current charging requirement of the battery 133. The adjustment manner is also to allocate the control right of the transmission power adjustment of the wireless transmission circuit 121 to the first control module 122, and the first control module 122 can adjust the transmission power of the wireless transmission circuit 121 immediately after receiving the feedback information of the device to be charged 13, and has the advantages of fast adjustment speed and high efficiency.

It should also be understood that the output current of the power supply 11 may be a constant direct current, a pulsating direct current, or an alternating current, which is not specifically limited by the present disclosure.

The above description is made by taking an example that the

wireless charging device

12 or 22 is connected to the power supply device 11 and obtains power from the power supply device 11, but the disclosure is not limited thereto, and the

wireless charging device

12 or 22 may also integrate a function similar to an adapter therein, so as to directly convert an externally input alternating current (e.g. commercial power) into the above electromagnetic signal (or electromagnetic wave). For example, the function of the adapter may be integrated in the wireless transmission circuit 121 of the

wireless charging device

12 or 22, for example, a rectifying circuit, a primary filter circuit, a transformer, and/or the like may be integrated in the wireless transmission circuit 121. In this way, the wireless transmitting circuit 121 can be used to receive an externally input ac power (e.g. 220V ac power, or commercial power) and generate an electromagnetic signal (or electromagnetic wave) according to the ac power. Integrating the adapter-like function inside the

wireless charging apparatus

12 or 22 can make the

wireless charging apparatus

12 or 22 not need to obtain power from an external power supply device, thereby improving the integration level of the

wireless charging apparatus

12 or 22 and reducing the number of devices required for implementing the wireless charging process.

Further, the power supply device 11 described above includes: a quick-charging type power supply device and a general type power supply device. Wherein the maximum output power provided by the quick-charging type power supply device is greater than or equal to a preset value. The maximum output power provided by the general type of power supply device is less than the preset value. It should be understood that in the embodiments of the present application, the fast charge type power supply device and the general type power supply device are classified only by the maximum output power, and other characteristics of the power supply devices are not distinguished. That is, the fast charge type and the normal type may be respectively equivalent to the first type and the second type. For example, a power supply device having a maximum output power of greater than or equal to 20W may be classified as a fast charge type power supply device, and a power supply device having a maximum output power of less than 20W may be classified as a general type power supply device.

Accordingly, the

wireless charging apparatus

12 or 22 may support a first wireless charging mode and a second wireless charging mode, and the charging speed of the device to be charged 13 by the

wireless charging apparatus

12 or 22 in the first wireless charging mode is faster than the charging speed of the device to be charged 13 by the

wireless charging apparatus

12 or 22 in the second wireless charging mode. In other words, the

wireless charging device

12 or 22 operating in the first wireless charging mode takes less time to fully charge the battery in the same capacity of the device to be charged 13 than the

wireless charging device

12 or 22 operating in the second wireless charging mode.

The first wireless charging mode may be a fast wireless charging mode. The fast wireless charging mode may refer to a wireless charging mode in which the transmission power of the

wireless charging device

12 or 22 is large (typically greater than or equal to 15W).

The second wireless charging mode may be a normal wireless charging mode, which may refer to a wireless charging mode in which the transmission power of the

wireless charging device

12 or 22 is small (generally less than 15W, and the common transmission power is 5W or 10W), for example, a conventional wireless charging mode based on QI standard, PMA standard or A4WP standard.

It usually takes several hours to fully charge a larger battery (e.g., 3000 ma-hour capacity battery) in a normal wireless charging mode; in the fast wireless charging mode, the charging time required for completely charging the battery with the same capacity can be obviously shortened due to the higher charging speed.

In some embodiments, the first control module 122 communicates bi-directionally with the second control module 135 to control the transmit power of the wireless transmit circuitry 121 in the first wireless charging mode.

In some embodiments, the bidirectional communication between the first control module 122 and the second control module 135 to control the transmission power of the wireless transmission circuit 121 in the first wireless charging mode may include: the first control module 122 communicates bi-directionally with the second control module 135 to negotiate a wireless charging mode between the

wireless charging apparatus

12 or 22 and the device to be charged 13.

For example, the first control module 122 performs handshake communication with the second control module 135, and in case of success of the handshake communication, controls the

wireless charging apparatus

12 or 22 to charge the device to be charged 13 using the first wireless charging mode, and in case of failure of the handshake communication, controls the

wireless charging apparatus

12 or 22 to charge the device to be charged 13 using the second wireless charging mode.

Handshake communication may refer to the identification of the two communicating parties as to the identity of each other. The success of handshake communication may indicate that both the

wireless charging apparatus

12 or 22 and the device to be charged 13 support a wireless charging mode with adjustable transmission power. The handshake communication failure may indicate that at least one of the

wireless charging apparatus

12 or 22 and the device to be charged 13 does not support the wireless charging mode with adjustable transmission power.

In this disclosure, the

wireless charging device

12 or 22 does not blindly adopt the first wireless charging mode to perform the fast wireless charging on the device to be charged 13, but performs the bidirectional communication with the device to be charged 13, and negotiates whether the

wireless charging device

12 or 22 can adopt the first wireless charging mode to perform the fast wireless charging on the device to be charged 13, so as to improve the safety of the charging process.

In some embodiments, the bidirectional communication between the first control module 122 and the second control module 135 to negotiate the wireless charging mode between the

wireless charging apparatus

12 or 22 and the device to be charged 13 may include, for example: the first control module 122 sends a first instruction to the second control module 135, where the first instruction is used to inquire whether the device to be charged 13 starts the first wireless charging mode; the first control module 122 receives a reply instruction for the first instruction sent by the second control module 135, where the reply instruction is used to indicate whether the to-be-charged device 13 agrees to turn on the first wireless charging mode; in the case where the device to be charged 13 agrees to turn on the first wireless charging mode, the first control module controls the

wireless charging apparatus

12 or 22 to charge the device to be charged 13 using the first wireless charging mode.

In addition to determining the wireless charging mode based on the communication negotiation manner, the first control module 122 may select or switch the wireless charging mode according to some other factors, for example, the first control module 122 may control the

wireless charging device

12 or 22 to charge the battery 133 using the first wireless charging mode or the second wireless charging mode according to the temperature of the battery 133. For example, when the temperature is lower than a preset low temperature threshold (e.g., 5 ℃ or 10 ℃), the first control module 122 may control the

wireless charging apparatus

12 or 22 to perform normal charging using the second wireless charging mode, and when the temperature is greater than or equal to the low temperature threshold, the first control module 122 may control the

wireless charging apparatus

12 or 22 to perform fast charging using the first wireless charging mode. Further, when the temperature is higher than a high temperature threshold (e.g., 50 ℃), the first control module 122 may control the

wireless charging apparatus

12 or 22 to stop charging.

Before introducing the wired charging system, a description will be given of a "normal charging mode" and a "fast charging mode" in the wired charging system. The normal charging mode refers to the adapter outputting a relatively small current value (typically less than 2.5A) or charging the battery in the device to be charged with a relatively small power (typically less than 15W). It usually takes several hours to fully charge a larger capacity battery (e.g., 3000 ma-hour capacity battery) in the normal charging mode. The fast charging mode means that the adapter is capable of outputting a relatively large current (typically greater than 2.5A, such as 4.5A, 5A or even higher) or charging the battery in the device to be charged with a relatively large power (typically greater than or equal to 15W). Compared with the ordinary charging mode, the adapter has higher charging speed in the quick charging mode, and the charging time required for completely charging the battery with the same capacity can be obviously shortened.

In the wired charging process, a power supply device (e.g., an adapter) is generally connected to a device to be charged through a cable, and the power supplied by the power supply device is transmitted to the device to be charged through the cable to charge the device to be charged.

Referring to fig. 3, the wired charging system 3 includes: a power supply device 31 and a device to be charged 32. The Power supply device 31 may be, for example, a Power adapter, a portable Power source (Power Bank), or the like; the device to be charged 32 may be, for example, a terminal device.

The device to be charged 32 can be charged by the power supply device 31 of 10W (5V/2A), i.e. the power supply device 31 charges the device to be charged 32 in the above-mentioned normal charging mode.

The power supply device 31 includes: a rectifying circuit 311, a filter circuit 312, and a charging interface 313.

The rectifying circuit 311 is configured to convert an input ac power into a dc power, and the filtering circuit 312 is configured to perform a filtering operation on the dc power output by the rectifying circuit 311, so as to provide a stable dc power for the device to be charged 32 connected thereto through the charging interface 313.

The device to be charged 32 includes: a charging interface 321, a battery unit 322, and a charging Integrated Circuit (IC) 323.

The device to be charged 32 receives the power supplied by the power supply device 31 through the charging interface 321. The charging interface 321 may be, for example, a USB 2.0 interface, a Micro USB interface, or a USB TYPE-C interface. In some embodiments, the charging interface 123 may also be a lightning interface, or any other type of parallel or serial interface capable of being used for charging. The battery unit 322 includes, for example, a single lithium battery cell, and the charge cut-off voltage of the single battery cell is typically 4.2V, so that a charging integrated circuit 323 is required to convert the 5V voltage into a charging voltage suitable for the battery unit 322.

In addition, the charging integrated circuit 323 may also serve as a converter circuit to control the charging voltage and/or charging current of the battery cells 322 during the different charging phases described above. For example, during the constant current charging phase, the inverter circuit may utilize a current feedback loop to cause the magnitude of the current into the battery to meet the magnitude of the first charging current expected by the battery. During the constant voltage charging phase, the transformation circuit may utilize a voltage feedback loop such that the magnitude of the voltage applied across the battery cell 322 meets the magnitude of the charging voltage expected by the battery. During the trickle charge phase, the conversion circuit may utilize a current feedback loop such that the magnitude of the current into the battery meets the magnitude of a second charge current expected by the battery (the second charge current being less than the first charge current).

The charging integrated circuit 323 may also acquire battery capacity information of the battery cell 322 to adjust a charging voltage and/or a charging current applied to both ends of the battery cell 322 according to the battery capacity information of the battery cell 322. For example, the charging integrated circuit 323 may measure the charging voltage and/or the charging current by an electricity meter.

Referring to fig. 4, the wired charging system 4 includes: a power supply device 41 and a device to be charged 42. The Power supply device 41 may be, for example, a Power adapter, a portable Power source (Power Bank), or the like; the device to be charged 42 may be, for example, a terminal device.

The device to be charged 42 can be rapidly charged by the high-power supply device 41 of 20W (5V/4A), that is, the power supply device 41 charges the device to be charged 42 in the above-mentioned rapid charging mode.

The power supply device 41 includes: rectifier circuit 411, filter circuit 412, voltage conversion (voltage conversion) circuit 413, first control unit 414, and charging interface 415.

The rectifying circuit 411 is configured to convert an input ac power into a dc power; the filter circuit 412 is used for performing a filtering operation on the direct current output by the rectifier circuit 411 to provide a stable direct current; the voltage converting circuit 413 is used for performing voltage conversion on the direct current output by the filtering circuit 412, and the voltage converting circuit 413 is generally a voltage reducing circuit so as to provide direct current with a suitable voltage for the device to be charged 42 connected with the voltage converting circuit through the charging interface 415; the first control unit 414 is used for receiving feedback of the device to be charged 42 to control the voltage and/or current of the direct current output by the rectifying circuit 411. In addition, the first control unit 414 is also used for controlling the charging voltage and/or the charging current of the battery unit 422 of the device to be charged 42 in the different charging phases (such as the constant current charging phase, the constant voltage charging phase, etc.) described above.

In some embodiments, the power supply 41 may also provide pulsating dc power to charge the device to be charged 42. The power supply device 41 outputs pulsating direct current, for example, the filter circuit 412 can be eliminated, so that the unfiltered current output by the rectifier circuit 411 directly supplies power to the device to be charged 42 after passing through the voltage conversion circuit 413 and the charging interface 415. Alternatively, the electrolytic capacitor included in the filter circuit 412 may be removed to output the pulsating direct current.

The device to be charged 42 includes: charging interface 421, battery unit 422, second control unit 423, detection circuit 424, and charging circuit 425.

The charging circuit 425 is connected to the charging interface 421 and the battery unit 422, and is used for charging the battery unit 422. The charging interface 421 may be, for example, a USB 2.0 interface, a Micro USB interface, or a USB TYPE-C interface. In some embodiments, the charging interface 421 may also be a lightning interface, or any other type of parallel interface or serial interface capable of being used for charging.

Still taking a lithium battery including a single lithium battery cell as an example of the battery unit 422, since the voltage conversion circuit 413 is arranged in the power supply device 41, the voltage output by the power supply device 41 can be directly applied to two ends of the battery unit 422, so that the charging circuit 425 charges the battery unit 422 in a direct charging manner, and the electric energy output by the power supply device 41 passes through the charging circuit 425 and is directly provided to the battery unit 422 without voltage conversion to charge the battery; alternatively, the charging circuit 425 may be a switch circuit, and the voltage drop (voltage drop) of the current output by the power supply 41 after passing through the charging circuit 425 has little change so as not to substantially affect the charging process of the battery unit 422.

The detection circuit 424 is used to detect a voltage value and/or a current value between the charging circuit 425 and the battery cell 422, that is, an output voltage and/or an output current of the charging circuit 425, which is directly applied to the battery cell 422 to charge the battery cell 422. Further, the detection circuit 424 may further include: and an electricity meter for detecting the capacity of the battery unit 422.

The second control unit 423 communicates with the power supply apparatus 41 to transmit the voltage value and/or the current value loaded on the battery unit 422 detected by the detection circuit 424, and the battery capacity information of the battery unit 422 and the like to the power supply apparatus 41. The second control unit 423 may communicate with the power supply device 41 through the charging interface 421, for example, without providing an additional communication interface or other wireless communication module. If the charging interface 421 is a USB interface, the second control unit 423 and the power supply device 41 can communicate based on data lines (e.g., D + and/or D-lines) in the USB interface. As another example, the charging interface 421 is a USB interface (e.g., a USB TYPE-C interface) supporting a power transfer (PD) communication protocol, and the second control unit 423 and the power supply device 41 can communicate based on the PD communication protocol. Further, the second control unit 423 may be also communicatively connected to the power supply apparatus 41 by another communication method other than the charging interface 421. For example, the second control unit 423 may communicate with the power supply apparatus 11 in a wireless manner, such as near field communication.

For the equipment to be charged containing a single battery cell, when a large charging current is used for charging the single battery cell, the heating phenomenon of the equipment to be charged is serious. In order to guarantee the charging speed of the equipment to be charged and relieve the heating phenomenon of the equipment to be charged in the charging process, the battery structure can be modified, a plurality of battery cores which are mutually connected in series are used, and the plurality of battery cores are directly charged, namely, the voltage output by the adapter is directly loaded to the two ends of the battery unit comprising the plurality of battery cores. Compared with the single-battery-core scheme (that is, the capacity of a single battery core before improvement is considered to be the same as the total capacity of the plurality of battery cores connected in series after improvement), if the same charging speed is to be achieved, the charging current required by the plurality of battery cores is about 1/N (N is the number of the battery cores connected in series) of the charging current required by the single battery core, in other words, on the premise of ensuring the same charging speed, the plurality of battery cores are connected in series, so that the size of the charging current can be greatly reduced, and the heat productivity of the device to be charged in the charging process is further reduced.

Referring to fig. 5, the wired charging system 5 includes: a power supply device 51 and a device to be charged 52. The Power supply device 51 may be, for example, a Power adapter, a mobile Power supply (Power Bank), or the like; the device to be charged 52 may be, for example, a terminal device.

The device to be charged 52 can be rapidly charged by the high-power supply device 51 of 50W (10V/5A), that is, the power supply device 51 charges the device to be charged 52 in the above-mentioned rapid charging mode.

The power supply device 51 includes: the control circuit comprises a rectifying circuit 511, a filter circuit 512, a voltage conversion circuit 513, a first control unit 514 and a charging interface 515.

The rectifying circuit 511 is configured to convert an input ac power into a dc power; the filter circuit 512 is used for performing a filtering operation on the direct current output by the rectifying circuit 511 to provide a stable direct current; the voltage conversion circuit 513 is configured to perform voltage conversion on the direct current output by the filter circuit 512, so as to provide direct current with a suitable voltage for the device to be charged 52 connected thereto through the charging interface 515; the first control unit 514 is used for receiving feedback of the device to be charged 52 to control the voltage and/or current of the direct current output by the rectifying circuit 511. In addition, the first control unit 514 is also used for controlling the charging voltage and/or the charging current of the first battery unit 522 and the second battery unit 522' of the device to be charged 52 in the different charging phases (such as the constant current charging phase, the constant voltage charging phase, etc.).

In some embodiments, the power supply 51 may also provide pulsating dc power to charge the device to be charged 52. The power supply device 51 outputs pulsating direct current, for example, the filter circuit 512 can be eliminated, so that the unfiltered current output by the rectifier circuit 511 directly supplies power to the device to be charged 52 after passing through the voltage conversion circuit 513 and the charging interface 515. Alternatively, the electrolytic capacitor included in the filter circuit 512 may be removed to output the pulsating direct current.

The device to be charged 52 includes: charging interface 521, first battery unit 522, second battery unit 522', second control unit 523, detection circuit 524, and charging circuit 525.

The charging interface 521 may be, for example, a USB 2.0 interface, a Micro USB interface, or a USB TYPE-C interface. In some embodiments, the charging interface 521 may also be a lightning interface, or any other type of parallel interface or serial interface capable of being used for charging.

The first battery cell 522 is connected in series with the second battery cell 522'. The first battery unit 522 and the second battery unit 522' are each, for example, a lithium battery including a single cell. The charging circuit 525 is connected to the charging interface 521 and the first battery unit 522 and the second battery unit 522 'connected in series, and is used for charging the first battery unit 522 and the second battery unit 522'. The voltage output by the power supply device 51 can be directly applied to the two ends of the first battery unit 32 and the second battery unit 32 'connected in series, that is, the charging circuit 35 charges the first battery unit 522 and the second battery unit 522' connected in series in a direct charging manner. It should be noted that, since the charging circuit 525 charges the first battery unit 522 and the second battery unit 522 'connected in series in a direct charging manner, and a voltage drop in the charging line is caused by line impedance, the output voltage output by the power supply device 51 received by the charging circuit 525 needs to be greater than the total voltage of the multiple battery cells included in the first battery unit 522 and the second battery unit 522'. Generally, the operating voltage of a single cell is between 3.0V and 4.35V, and taking the two cells connected in series as an example, the output voltage of the power supply device 51 may be set to be greater than or equal to 10V.

The detection circuit 524 is configured to detect a voltage value and/or a current value between the charging circuit 525 and the first battery cell 522 and the second battery cell 522 ', that is, an output voltage and/or an output current of the charging circuit 525, which is directly applied to the first battery cell 522 and the second battery cell 522 ' to charge the first battery cell 522 and the second battery cell 522 '. In addition, the detection circuit 524 may further include: and an electricity meter for detecting capacities of the first and second battery cells 522 and 522'.

The second control unit 523 communicates with the power supply device 51 to transmit the voltage value and/or the current value loaded on the first battery cell 522 and the second battery cell 522 'detected by the detection circuit 524, and the battery capacity information of the first battery cell 522 and the second battery cell 522', and the like, to the power supply device 51. The second control unit 523 may communicate with the power supply device 51 through the charging interface 521, for example, without providing an additional communication interface or other wireless communication module. If the charging interface 521 is a USB interface, the second control unit 523 and the power supply apparatus 51 may communicate based on a data line (e.g., a D + and/or D-line) in the USB interface. As another example, the charging interface 521 is a USB interface (e.g., a USB TYPE-C interface) supporting a power transfer (PD) communication protocol, and the second control unit 523 and the power supply device 51 can communicate based on the PD communication protocol. Further, the second control unit 523 may also be communicatively connected to the power supply apparatus 51 by another communication method other than the charging interface 521. For example, the second control unit 523 may communicate with the power supply device 51 in a wireless manner, such as near field communication.

It is noted that the block diagrams shown in the above figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

In the current constant current and constant voltage charging method, in the constant current charging stage, the constant current charging current is determined according to the initial capacity (rated capacity) of the battery. However, as the charge and discharge cycles are continuously performed, the capacity of the battery is continuously decreased, and if the charging is continuously performed by using the constant current charging current calculated from the initial rated capacity of the battery, the current exceeds the optimum current to be initially set. For example, assuming that the charging rate is 3C current, assuming that the rated capacity of the battery is 1700mAh, the initially calculated constant current charging current is 3 × 1700mA — 5.1A; when the battery is recycled hundreds of times, its capacity is greatly reduced to 80% of the initial capacity, i.e., 1700mAh 0.8 to 1360 mAh. If the charging is still performed using a constant current charging current of 5.1A at this time, the charging rate is increased to 3.7C, which exceeds the optimum use rate for the battery system design. The aging of the internal materials of the battery system can be accelerated by using the lithium ion battery with the over-doubling rate, and meanwhile, the accumulation of lithium ions (Li +) on the surface of the negative electrode can be accelerated, so that the probability of lithium precipitation on the surface of the negative electrode is increased, and the risk of short circuit of the battery is increased. Meanwhile, the battery capacity attenuation is further accelerated on the premise that the battery is aged, and meanwhile, the battery life aging is further accelerated.

In order to solve the above problems, the present disclosure proposes a battery charging method that can prevent battery aging, which can determine a charging current in a constant charging stage according to a measured actual capacity of a present battery, thereby avoiding a situation of accelerating battery aging due to over-rate use.

FIG. 6 is a flow chart illustrating a method of charging a battery according to an exemplary embodiment. The battery charging method 10 shown in fig. 6 may be applied to the

wireless charging system

1 or 2 shown in fig. 1 or 2, or may be applied to the

wired charging system

3, 4, or 5 shown in fig. 3 to 5.

Referring to fig. 6, the battery charging method 10 includes:

in step S102, the current actual capacity of the battery is acquired.

Taking the wired charging system or the wireless charging system as an example, the current capacity of the battery can be measured by a detection circuit (e.g., a fuel gauge) connected to the battery. During measurement, the current capacity of the battery can be detected after each charging of the battery is finished, or the current capacity of the battery can be detected before the next charging of the battery.

For example, the current actual capacity of the battery may be acquired from the device to be charged 13 by the first control module 122 in the

wireless charging apparatus

12 or 22 in the

wireless charging system

1 or 2. When the above-mentioned detection circuit detects the current actual capacity of the battery after the battery is charged, the first control module 122 may directly obtain and store the current actual capacity of the battery for the next charging, or may obtain the current actual capacity of the battery again before the next charging, that is, the battery capacity of the battery may be stored by the storage module in the device to be charged 13 itself to be provided to the first control module 122 before the next charging. When the above-mentioned detection circuit detects the current actual capacity of the battery before the next charging, the first control module 122 may obtain and store the current actual capacity after the detection circuit in the device to be charged 13 measures the current actual capacity of the battery.

Alternatively, the current actual capacity of the battery may also be acquired by the charging integrated circuit 323 in the device to be charged 32 in the wired charging system 3. Likewise, the detection circuit in the device to be charged 32 may measure the capacity of the battery after charging is complete, of course, or before the next charging. If measured after the charging is complete, it needs to be stored for use in the next charging.

Still alternatively, the current actual capacity of the battery may also be acquired by the first control unit 414 in the power supply apparatus 41 in the wired charging system 4 or the first control unit 514 in the power supply apparatus 51 in the wired charging system 5. Likewise, when the above-mentioned detection circuit detects the current actual capacity of the battery after the battery is charged, the first control unit 414 or 514 may directly obtain and store the current actual capacity of the battery for the next charging, or may obtain the current actual capacity of the battery again before the next charging, that is, the battery capacity of the battery may be stored by the storage module in the device to be charged 42 or 52 itself to be provided to the first control unit 414 or 514 before the next charging. When the above-mentioned detection circuit detects the current actual capacity of the battery before the next charging, the first control unit 414 or 514 may acquire and store the current actual capacity after the detection circuit in the device to be charged 42 or 52 measures the current actual capacity of the battery.

Still alternatively, the battery capacity of the battery may also be acquired by the second control module 135 in the device to be charged 13 in the

wireless charging system

1 or 2. Likewise, the detection circuit in the device to be charged 13 may measure the capacity of the battery of course after the charging is completed, or may measure it before the next charging. If measured after the charging is complete, it needs to be stored for the next charging.

Still alternatively, the battery capacity of the battery may also be acquired by the

second control unit

423 or 523 in the device to be charged 42 or 52 in the

wired charging system

4 or 5. Likewise, the detection circuit in the device to be charged 42 or 52 may measure the capacity of the battery after the charging is completed, or may measure it before the next charging. If measured after the charging is complete, it needs to be stored for the next charging.

In step S104, the charging current of the battery in the constant current charging phase is determined according to the current actual capacity of the battery.

After the current actual capacity of the battery is obtained, the charging current of the battery in the constant current charging stage can be adjusted according to the current actual capacity of the battery, and therefore the service life of the battery can be prolonged.

The above operation of determining the charging current of the battery in the constant current charging phase according to the current actual capacity of the battery may be performed, for example, by the first control module 122 in the

wireless charging device

12 or 22 in the above

wireless charging system

1 or 2, or by the first control unit 414 or 514 in the

power supply device

41 or 51 in the above

wired charging system

4 or 5, after the current actual capacity of the battery is obtained.

Furthermore, the above operations may be performed by the second control module 135 in the device to be charged 13 in the

wireless charging system

1 or 2, or by the charging integrated circuit 323 in the device to be charged 32 in the wired charging system 3, or by the

second control unit

423 or 523 in the device to be charged 42 or 52 in the

wired charging system

4 or 5, after the current actual capacity of the battery is acquired.

In some embodiments, for example, the current actual capacity of the battery may be compared with a stored current actual capacity of the battery measured after or before the previous charge is completed. When the current actual capacity of the battery is larger than or equal to the previous actual capacity, determining the charging current of the battery in the cross current charging stage as the previous charging current; when the current actual capacity of the battery is smaller than the previous actual capacity, calculating a new charging current based on the current actual capacity, and determining the new charging current as the charging current of the battery in the cross current charging stage. For example, the initial charging current is 3 × 1700mA to 5.1A, taking the rated multiplying factor of 3C and the rated capacity of the battery as 1700mAh as an example. Then if the current actual capacity of the battery is 1360mAh, the new charging current calculated based on the current actual capacity is 3 x 1360mAh, which is about 4.1A. Therefore, the problem of over-rate use caused by charging with the originally set charging current after the battery is circularly charged and discharged is solved.

When it needs to be explained, the "previous time" may be, for example, the previous time, that is, the current actual capacity of the battery needs to be measured after each charging is completed or before the charging is completed, the charging current of the battery in the constant current charging stage is determined according to the current actual capacity, and the current actual capacity is stored to be used as the previous actual capacity of the battery when the charging current is determined next time; or, considering that the actual capacity of the battery may not change much in two adjacent charging processes, the "previous time" may also be the previous N times, where N is a preset time threshold, that is, the current actual capacity of the battery may be measured and stored after or before the battery is charged every N charging processes, the charging current of the battery in the constant current charging stage is determined according to the current actual capacity, and the current actual capacity is stored to be used as the previous actual capacity of the battery when the charging current is determined next time. The threshold number may be determined according to actual requirements in the application, and the disclosure is not limited thereto.

In some embodiments, for example, the current actual capacity of the battery may be further input into a charging current determination model established after a large data learning, and the charging current determination model may be, for example, a corresponding relation table of the battery capacity and the charging current, which is obtained by, for example, statistical learning of a large amount of experimental data. According to the current actual capacity of the battery in the corresponding relation table, the new charging current corresponding to the current actual capacity of the battery can be quickly inquired. Alternatively, the charging current determination model may be a correspondence table of battery capacity and charging current calculation coefficient, which is obtained by, for example, statistical learning of a large amount of experimental data. That is, when the new charging current is calculated after the battery capacity is decreased, the corresponding calculation coefficient (e.g., the calculation coefficient 3 in the initial charging rate 3C) is also changed accordingly. And after the corresponding new coefficient is inquired in the corresponding relation table according to the current actual capacity of the battery, multiplying the new coefficient and the current actual capacity to obtain new charging current. Or, the charging current determining model may also be a training model based on an artificial neural network, which is trained according to a large amount of experimental data, and the model takes the battery capacity as input and the charging current as output, so that the current actual capacity may be input into the trained model to obtain the charging current output by the model.

In some embodiments, the battery charging method 10 may further include:

in step S106, control charges the battery with the determined charging current in the constant current charging phase.

For example, when the charging current is determined by the first control module 122 in the

wireless charging device

12 or 22 in the

wireless charging system

1 or 2, the output power of the wireless transmitting circuit 121 may be adjusted by the first control module 122, so that the current of the direct current output by the first charging channel 134 meets the charging requirement of the battery in the constant current charging phase, that is, the determined charging current. When the charging current is determined by the second control module 135 in the device to be charged 13 in the

wireless charging system

1 or 2, the second control module 135 may feed the charging current back to the first control module 122, so that the first control module 122 performs power adjustment on the wireless transmission circuit 121. That is, the operation of acquiring the current electric quantity of the battery and the operation of determining the charging current of the battery in the constant current charging stage according to the current electric quantity may be performed in the

wireless charging device

12 or 22; alternatively, it may be performed in the device to be charged 13. If executed in the device to be charged 13, the determined charging current may be fed back to the

wireless charging apparatus

12 or 22 to adjust the transmission power, so as to charge the battery with the determined charging current.

When the charging current is determined by the first control unit 414 or 514 in the

power supply apparatus

41 or 51 in the

wired charging system

4 or 5, the current of the direct current output by the rectifying circuit 411 or 511 can be controlled by the first control unit 414 or 514 so that the charging current loaded on the battery in the device to be charged 42 or 52 satisfies the charging requirement thereof in the constant-current charging phase, that is, the determined charging current. When the charging current is determined by the

second control unit

423 or 523 in the device to be charged 42 or 52, the

second control unit

423 or 523 needs to feed back the charging current to the first control unit 414 or 514, so that the first control unit 414 or 514 adjusts the output current of the rectifying circuit 411 or 511. That is, the operation of acquiring the current electric quantity of the battery and the operation of determining the charging current of the battery in the constant current charging stage according to the current electric quantity may be performed in the

power supply device

41 or 51; alternatively, it may be implemented in the device to be charged 42 or 52. If implemented in the

device

42 or 52 to be charged, the determined charging current may be fed back to the

power supply device

41 or 51 to adjust the output current, so as to charge the battery with the determined charging current.

It should be clearly understood that this disclosure describes how to make and use particular examples, but the principles of this disclosure are not limited to any details of these examples. Rather, these principles can be applied to many other embodiments based on the teachings of the present disclosure.

The FFC charging algorithm is to perform constant current charging to a certain cut-off voltage by a certain initial multiplying current, and then perform constant voltage charging to a certain cut-off current by the cut-off voltage. Unlike the CCCV charging algorithm, the cutoff voltage is higher than the factory rated voltage of the battery. Taking the battery rated cutoff voltage of 4.2V as an example, in the FFC algorithm, the cutoff voltage thereof is usually set to 4.25V. The cutoff current at the end of the constant voltage charging phase is also higher than the factory set rated cutoff current. For example, the rated off current of 0.01C is used in the conventional CCCV algorithm, while the off current may be set to 0.1C in the FFC algorithm. The voltage excess part in the constant current charging process is to assume that the floating voltage of the battery exists, so that the actual voltage of the battery does not reach the rated voltage. The increase of the cut-off current in the constant voltage charging process, namely the early cut-off, is based on the full battery capacity. Similarly, as the battery continues to undergo charge and discharge cycles, the actual capacity of the battery decreases. In this way, when the battery capacity decays, the current cut-off at the same current obviously exceeds the current which can be actually borne by the battery, and the quantity of lithium ions released from the positive electrode is more, so that the structural stability of the positive electrode material is further reduced, the structural damage of the material is accelerated, and the service life of the battery is reduced.

Based on this, the embodiments of the present disclosure further provide a method for further optimizing battery charging, so as to improve the battery life.

FIG. 7 is a flow chart illustrating another method of charging a battery according to an exemplary embodiment. The difference from the battery charging method 10 shown in fig. 6 is that the battery charging method 20 shown in fig. 7 further provides a method for dynamically adjusting the off-current during the constant voltage charging phase.

Referring to fig. 7, the battery charging method 20 includes:

in step S202, the off-current of the battery in the constant voltage charging phase is determined according to the current actual capacity of the battery.

After the current actual capacity of the battery is obtained, the cut-off current of the battery in the constant-voltage charging stage can be further adjusted according to the current actual capacity of the battery, so that the service life of the battery is prolonged.

The above operation of determining the off-current of the battery in the constant voltage charging phase according to the current actual capacity of the battery may be performed, for example, by the first control module 122 in the

wireless charging device

12 or 22 in the

wireless charging system

1 or 2, or by the first control unit 414 or 514 in the

power supply device

41 or 51 in the

wired charging system

4 or 5, after the current actual capacity of the battery is obtained.

wireless charging system

second control unit

423 or 523 in the device to be charged 42 or 52 in the

wired charging system

4 or 5, after the current actual capacity of the battery is acquired.

Determining the cutoff current of the battery during the constant voltage charging phase comprises: the off current is increased as the current actual capacity of the battery decreases. In some embodiments, the current actual capacity of the battery may be input into an off-current determination model established after a large data learning process, for example, the off-current determination model may be a corresponding relation table of the battery capacity and the off-current, which is obtained by performing statistical learning on a large amount of experimental data. According to the current actual capacity of the battery in the corresponding relation table, the new cut-off current corresponding to the current actual capacity of the battery can be quickly inquired. Or, the cutoff current determination model may also be a training model based on an artificial neural network, which is trained according to a large amount of experimental data, and the model takes battery capacity as input and cutoff current as output, so that the current actual capacity can be input into the trained model, the cutoff current output by the model is obtained, and the cutoff current is determined as the new cutoff current of the battery in the constant voltage charging stage.

In step S204, control stops the constant voltage charging process when the charging current of the battery falls to the determined cutoff current in the constant voltage charging phase.

For example, when the cutoff current is determined by the first control module 122 in the

wireless charging device

12 or 22 in the

wireless charging system

1 or 2, the end of the constant voltage charging process may be controlled by the first control module 122 according to the determined cutoff current. When the cutoff current is determined by the second control module 135 in the device to be charged 13 in the

wireless charging system

1 or 2, the second control module 135 may feed back the cutoff current to the first control module 122, so that the first control module 122 controls the end of the constant voltage charging process according to the determined cutoff current. That is, the operation of acquiring the current power amount of the battery and the operation of determining the off-current of the battery in the constant voltage charging stage according to the current power amount may be performed in the

wireless charging device

12 or 22; alternatively, it may be performed in the device to be charged 13. If the charging is performed in the device to be charged 13, the determined cutoff current may be fed back to the

wireless charging device

12 or 22, so that it controls the end of the constant voltage charging process according to the determined cutoff current.

When the off-current is determined by the first control unit 414 or 514 in the

power supply apparatus

41 or 51 in the

wired charging system

4 or 5, the end of the constant voltage charging process may be controlled by the first control unit 414 or 514 according to the determined off-current. When the cutoff current is determined by the

second control unit

423 or 523 in the device to be charged 42 or 52, the

second control unit

423 or 523 needs to feed back the cutoff current to the first control unit 414 or 514, so that the first control unit 414 or 514 controls the end of the constant voltage charging process according to the determined cutoff current. That is, the operation of acquiring the current capacity of the battery and the operation of determining the off-current of the battery in the constant voltage charging stage according to the current capacity may be performed in the

power supply device

41 or 51; alternatively, it may be implemented in the device to be charged 42 or 52. If the charging is performed in the

device

42 or 52 to be charged, the determined cutoff current may be fed back to the

power supply device

41 or 51 so that it controls the end of the constant voltage charging process according to the determined cutoff current.

According to another battery charging method provided by the embodiment of the disclosure, the cut-off current of the battery in the constant voltage charging stage is further adjusted according to the actual capacity of the battery, so that the aging and decay speed of the battery are further slowed down, and the service life of the battery is prolonged.

Further, the above-mentioned

battery charging method

10 or 20 may also be applied to the above-mentioned segmented constant current charging process. And respectively determining the charging currents of the M constant current stages according to the current actual capacity of the battery. The specific determination may be as described above. It will be understood by those skilled in the art that when determining the charging current based on the charging current determination model, different constant current phases may have different charging current determination models, such as the 1 st charging current determination model, the 2 nd charging current determination model, … …, the mth charging current determination model, respectively.

The above-described

battery charging method

10 or 20 may be applied to a step charging method. In the step charging mode, the charging process can be divided into a plurality of constant current charging stages and a plurality of constant voltage charging stages. Charging the battery with a first constant charging current, such as in a first constant current charging phase; when the voltage of the battery rises to a first cut-off voltage, the charging process enters a first constant voltage charging stage, and the battery is charged by a first constant voltage; in the first constant voltage charging process, when the charging current of the battery is reduced to the first cut-off current, a second constant current charging stage is entered, and the battery is charged by the second constant charging current; when the voltage of the battery rises to a second cut-off voltage, a second constant voltage charging stage is carried out in the charging process, and the battery is charged by a second constant voltage; in the second constant-voltage charging process, when the charging current of the battery is reduced to a second cut-off current, a third constant-current charging stage is started; and so on.

When the above-described

battery charging method

10 or 20 is applied to the step charging method, the charging current in different constant current charging stages and the off-current in different constant voltage charging stages may be adjusted according to the actual battery capacity. Likewise, it will be understood by those skilled in the art that when a charging current determination model is used to determine the charging current, different charging current determination models may be used for different constant current charging phases. When the off-current is determined using the off-current determination model, different off-current determination models may be corresponded for different constant-voltage charging phases.

It should be understood by those skilled in the art that the

wireless charging systems

1 and 2 and the wired charging systems 3-5 described above are only examples of applications of the

battery charging method

10 or 20, and do not limit the battery charging method of the present disclosure. That is, the

battery charging method

10 or 20 of the present disclosure may also be applied to other systems. The measurement of the actual capacity of the battery may not be limited to the measurement by the electricity meter described above. And the battery capacity read after each charging process is finished is obtained under a certain multiplying factor (such as 3C). At present, the multiplying power is generally higher multiplying power, so the capacity value at the multiplying power is probably smaller than the actual capacity. However, the rated capacity of the initial factory calibration at each test is generally data obtained by a 0.2C charge-discharge test, and data obtained at a high rate may not match the actual situation. Therefore, when the current actual capacity of the battery is measured, the actual capacity of the battery can be measured by charging and discharging at a lower rate (such as 0.2C) so as to obtain more accurate actual capacity of the battery.

Furthermore, it should be noted that the above-mentioned figures are only schematic illustrations of the processes involved in the methods according to exemplary embodiments of the present disclosure, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.

The following are embodiments of the disclosed apparatus that may be used to perform embodiments of the disclosed methods. For details not disclosed in the embodiments of the apparatus of the present disclosure, refer to the embodiments of the method of the present disclosure.

Referring to fig. 8, the battery charging device 30 includes: a battery capacity acquisition module 302 and a charging current determination module 304.

The battery capacity obtaining module 302 is configured to obtain a current actual capacity of the battery.

The charging current determining module 304 is configured to determine a charging current of the battery in a constant current charging stage according to the current actual capacity of the battery.

In some embodiments, the battery charging apparatus 30 further includes: and the constant current charging control module 306 is configured to control to charge the battery with the determined charging current in the constant current charging stage.

In some embodiments, the charging current determination module 304 includes: and the first charging current determining unit is used for calculating the charging current based on the same multiplying power used in a constant current charging stage in the previous charging process according to the current actual capacity of the battery when the current actual capacity of the battery is smaller than the stored actual capacity measured after the previous charging of the battery is finished or before the previous charging.

In some embodiments, the charging current determination module 304 further comprises: and the second charging current determining unit is used for determining the charging current as the charging current of the battery in the constant current charging stage in the previous charging process when the current actual capacity of the battery is greater than or equal to the stored actual capacity measured after the previous charging of the battery is finished or before the previous charging.

In some embodiments, the charging current determination module 304 includes: a third charging current determining unit, configured to input a current actual capacity of the battery into a charging current determination model, so as to output the charging current according to the charging current determination model; wherein the charging current determination model is a model established based on big data learning.

In some embodiments, the battery charging apparatus 30 further includes: and the cutoff current determining module is used for determining the cutoff current of the battery in the constant-voltage charging stage according to the current actual capacity of the battery.

In some embodiments, the off-current determination module comprises: a first off-current determination unit for inputting a present actual capacity of the battery into an off-current determination model to output the off-current according to the off-current determination model; wherein the off-current determination model is a model established from big data learning.

In some embodiments, the battery charging apparatus 30 further includes: and the constant voltage charging control module is used for controlling the constant voltage charging process to be stopped when the charging current of the battery is reduced to the cut-off current in the constant voltage charging stage.

In some embodiments, the charging current determination module 304 includes: and the fourth charging current determining unit is used for respectively determining the charging current of the battery in different constant current charging stages according to the current actual capacity of the battery.

In some embodiments, the off-current determination module comprises: and the second cutoff current determining unit is used for respectively determining the cutoff currents of the battery in different constant-voltage charging stages according to the current actual capacity of the battery.

According to the battery charging device provided by the embodiment of the disclosure, the current actual capacity of the battery can be obtained by continuously measuring the capacity of the battery, and the charging current in the constant current charging stage of the battery is continuously adjusted according to the actual capacity, so that the aging and attenuation speed of the battery is slowed to the greatest extent, and the service life of the battery is prolonged.

Referring to fig. 9, a program product 900 configured to implement the above method according to an embodiment of the present disclosure is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present disclosure is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The computer readable medium carries one or more programs which, when executed by a device, cause the computer readable medium to implement the battery charging method as shown in fig. 6 or fig. 7.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

A method of charging a battery, comprising:

acquiring the current actual capacity of the battery; and

and determining the charging current of the battery in the constant current charging stage according to the current actual capacity of the battery.
The method of claim 1, further comprising: and controlling the constant current charging stage to charge the battery by the determined charging current.
The method of claim 1 or 2, wherein determining the charging current of the battery in the constant current charging phase according to the current actual capacity of the battery comprises:

and when the current actual capacity of the battery is smaller than the stored actual capacity measured after the previous charging of the battery is finished or before the previous charging, calculating the charging current according to the current actual capacity of the battery and based on the same multiplying power used in the constant current charging stage in the previous charging process.
The method of claim 3, wherein determining the charging current of the battery during the constant current charging phase based on the current actual capacity of the battery further comprises:

and when the current actual capacity of the battery is larger than or equal to the stored actual capacity measured after the previous charging of the battery is finished or before the previous charging, determining the charging current as the charging current of the battery in the constant current charging stage in the previous charging process.
The method of claim 1 or 2, wherein determining the charging current of the battery in the constant current charging phase according to the current actual capacity of the battery comprises:

inputting the current actual capacity of the battery into a charging current determination model so as to output the charging current according to the charging current determination model;

wherein the charging current determination model is a model established based on big data learning.
The method of claim 1 or 2, further comprising: and determining the cut-off current of the battery in the constant-voltage charging stage according to the current actual capacity of the battery.
The method of claim 6, wherein determining the cutoff current of the battery during the constant voltage charging phase based on the current actual capacity of the battery comprises:

inputting a present actual capacity of the battery into a cutoff current determination model to output the cutoff current according to the cutoff current determination model;

wherein the off-current determination model is a model established from big data learning.
The method of claim 6, further comprising: and controlling to stop the constant voltage charging process when the charging current of the battery is reduced to the cut-off current in the constant voltage charging stage.
The method of claim 6, wherein determining the charging current of the battery during a constant current charging phase according to the current actual capacity of the battery comprises:

and respectively determining the charging current of the battery in different constant current charging stages according to the current actual capacity of the battery.
The method according to claim 9, characterized in that, according to the current actual capacity of the battery, the cutoff current of the battery during the constant voltage charging phase is determined:

and respectively determining the cut-off current of the battery in different constant voltage charging stages according to the current actual capacity of the battery.
A battery charging apparatus, comprising:

the battery capacity acquisition module is used for acquiring the current actual capacity of the battery; and

and the charging current determining module is used for determining the charging current of the battery in a constant current charging stage according to the current actual capacity of the battery.
An apparatus to be charged, comprising: a battery and control module;

the control module is used for acquiring the current actual capacity of the battery and determining the charging current of the battery in a constant current charging stage according to the current actual capacity of the battery.
The device to be charged according to claim 12, wherein the control module is further configured to control the battery to be charged with the determined charging current in the constant-current charging phase.
The apparatus to be charged according to claim 12, wherein the control module is further configured to provide the determined charging current to a wireless charging device or a power supply device.
A device to be charged according to any of claims 12-14, wherein the control module is configured to calculate the charging current based on the same rate as used in a constant current charging phase in a previous charging process according to the current actual capacity of the battery when the current actual capacity of the battery is less than the stored actual capacity of the battery measured after the previous charging process or before the previous charging process.
The device to be charged according to claim 15, wherein the control module is further configured to determine the charging current as a charging current of the battery in a constant current charging phase during a previous charging process when a current actual capacity of the battery is greater than or equal to a stored actual capacity of the battery measured after or before a previous charging process.
A device to be charged according to any of claims 12-14, wherein the control module is configured to input the present actual capacity of the battery into a charging current determination model, so as to output the charging current according to the charging current determination model; wherein the charging current determination model is a model established based on big data learning.
A device to be charged according to any of claims 12-14, wherein the control module is further configured to determine a cutoff current of the battery during the constant voltage charging phase according to a current actual capacity of the battery.
The device to be charged according to claim 18, wherein the control module is configured to input a present actual capacity of the battery into a cutoff current determination model to output the cutoff current according to the cutoff current determination model; wherein the off-current determination model is a model established from big data learning.
A device to be charged according to claim 18, wherein the control module is further configured to control to stop the constant voltage charging process when the charging current of the battery falls to the cutoff current in the constant voltage charging phase.
The device to be charged according to claim 18, wherein the control module is further configured to provide the determined cutoff current to the wireless charging apparatus or the power supply apparatus.
The device to be charged according to claim 18, wherein the control module is configured to determine the charging current of the battery in different constant current charging stages according to the current actual capacity of the battery.
A device to be charged according to claim 22, wherein the control module is configured to determine the cut-off current of the battery in different constant voltage charging phases according to the current actual capacity of the battery.
A wireless charging device, comprising: the control module is used for acquiring the current actual capacity of the battery and determining the charging current of the battery in the constant current charging stage according to the current actual capacity of the battery.
The wireless charging device of claim 24, wherein the control module is further configured to control charging the battery with the determined charging current during the constant current charging phase.
The wireless charging device of claim 24 or 25, wherein the control module is configured to calculate the charging current according to the current actual capacity of the battery based on the same rate as that used in the constant current charging phase in the previous charging process when the current actual capacity of the battery is smaller than the stored actual capacity of the battery measured after the previous charging process or before the previous charging process.
The wireless charging device of claim 26, wherein the control module is further configured to determine the charging current as a charging current of the battery during a constant current charging phase during a previous charging process when a current actual capacity of the battery is greater than or equal to a stored actual capacity of the battery measured after a previous charging process or before the previous charging process.
The wireless charging device according to claim 24 or 25, wherein the control module is configured to input the current actual capacity of the battery into a charging current determination model, so as to output the charging current according to the charging current determination model; wherein the charging current determination model is a model established based on big data learning.
The wireless charging device of claim 24 or 25, wherein the control module is further configured to determine a cutoff current of the battery during a constant voltage charging phase according to a current actual capacity of the battery.
The wireless charging device of claim 29, wherein the control module is configured to input a present actual capacity of the battery into a cutoff current determination model to output the cutoff current according to the cutoff current determination model; wherein the off-current determination model is a model established from big data learning.
The wireless charging apparatus of claim 29, wherein the control module is further configured to control to stop the constant voltage charging process when the charging current of the battery decreases to the cutoff current in the constant voltage charging phase.
The wireless charging device of claim 29, wherein the control module is configured to determine the charging current of the battery in different constant current charging phases according to the current actual capacity of the battery.
The wireless charging apparatus of claim 32, wherein the control module is configured to determine the cutoff currents of the battery in different constant voltage charging phases according to the current actual capacity of the battery.
A power supply apparatus, comprising: the control module is used for acquiring the current actual capacity of the battery and determining the charging current of the battery in the constant current charging stage according to the current actual capacity of the battery.
The power supply device according to claim 34, wherein the control module is further configured to control the battery to be charged with the determined charging current in the constant-current charging phase.
The power supply device according to claim 34 or 35, wherein the control module is configured to calculate the charging current based on the same rate as that used in a constant current charging phase in a previous charging process according to the current actual capacity of the battery when the current actual capacity of the battery is smaller than the stored actual capacity of the battery measured after the previous charging process or before the previous charging process.
The power supply device according to claim 36, wherein the control module is further configured to determine the charging current as a charging current in a constant current charging phase of the battery during a previous charging process when a current actual capacity of the battery is greater than or equal to a stored actual capacity of the battery measured after or before a previous charging process.
The power supply device according to claim 34 or 35, wherein the control module is configured to input the current actual capacity of the battery into a charging current determination model to output the charging current according to the charging current determination model; wherein the charging current determination model is a model established based on big data learning.
The power supply device as claimed in claim 34 or 35, wherein the control module is further configured to determine a cutoff current of the battery in the constant voltage charging phase according to a current actual capacity of the battery.
The power supply device according to claim 39, wherein the control module is configured to input a present actual capacity of the battery into a cutoff current determination model to output the cutoff current according to the cutoff current determination model; wherein the off-current determination model is a model established from big data learning.
The power supply device according to claim 39, wherein the control module is further configured to control to stop the constant voltage charging process when the charging current of the battery decreases to the cutoff current in the constant voltage charging phase.
The power supply device according to claim 39, wherein the control module is configured to determine the charging current of the battery in different constant current charging stages respectively according to the current actual capacity of the battery.
The power supply device as claimed in claim 42, wherein the control module is configured to determine the cut-off current of the battery in different constant voltage charging phases according to the current actual capacity of the battery.
A computer-readable storage medium having computer-executable instructions stored thereon, wherein the executable instructions, when executed by a processor, implement the method of any of claims 1-10.